Cap closure



Oct. 10, 1933. D. B. RONZONE CAP CLOSURE Filed June 2, 1951 INVENTOR M Q 'Y A; ATTORNEYS 0 M Patented Oct. 110, 1933 oAPoLosUnE David B. Ronzone, Brooklyn, N. Y., assignor to Vacuum Packing Corporation, Salem, N. J., a corporation 01 Delaware Application June 2, 1931. Serial No. 541,601

1 Claim.

The present invention relates to cap closures and particularly to cap closures for closing jars.

It is an object of the invention to provide a cap closure capable of closing and sealing a jar 5 or container against the admission thereto of A further object is to provide such a closure which can be easily and quickly removed with an ordinary knife without destroying or damaging the closure.

A still further object is to provide such a clossure in combination with a container each of which cooperates with a rubber or similar washer in such a way as to permit the manual're- 15 closing of the container to. form a perfect seal against the admission of air, the position of the parts after re-closing being the same, or substantially the same, as in the original closing and sealing, the parts being so arranged that I there is a distinct tendency for the closure to maintain itself in sealing position but being a1 ways removable by the simplest kind of convenient implement, such as an ordinary knife.

. Other objects and advantagesoi the mven= tion will appear from the following description taken connection with the accompanying drawing which illustrates a preferred embodiment of the invention and in which Figure l is a top plan view of a container and 3c closure constructed in accordance with the pres= ent invention;

Figure 2 is side elevation thereof partly in section on the line 2-2 of Figure l; I

Figure 3 is a fragmentary vertical sectional view on a larger scale and taken on the line 3-3 of Figure l;

Figure i is a view similar to Figure 3' and lllus trating a modified iorm of cap;

Figure 5 is a fragmentary sectionalview of 4c the sealing washer.

Referring in detail to the drawing, the container 11 is provided an annular sealing flange 12 about its mouth. The flange 12 may be exteriorly spherically or similarly curved as shown in Figures 2, 3 and 4 so that-the over-all wardly extending flange 16, the bottom of which is rolled outwardly into a head 18, the whole of which is thereafter bent inwardly -to provide for the reception and support of a sealing washer 20 which is preferably of rubber and is normally to cylindrical or substantially cylindrical internally and externally, its normal internal diameter, undeiormed, being less than the maximum ex-- ternal diameter of the sealing flange 12 oil the container.

As a result of this structure, when the cap closure is placed upon the container, as shown in Figure 2, with the top surface of the cap in contact with the upper edge of the flange 12, and e the head 18 somewhat spaced from the radial to flange ii of the container, to permit insertion of a knife or similar convenient implement between said flange and the head, the deformable washer has the shape shown in Figures 2, 3 or l, being compressed to a maximum degree at some point .55 intermediate its upper and lower edges and its internal diameter when so compressed and deformed being greatest intermediate its upper and lower edges and being least at eith r its upper or lower edges or at both where the parts are so so formed as make the uppermost and lowermost internal diameters equal.

As a result oi the ioregoing construction, the closure tends to remain in sealing and closing position not only when iorminga vacuum seal as as applied, for example, to the closure by the packer, but also when the purchaser oi the container has broken the vacuum seal, used part of the contents and-has returned the closure to the closing position of Figure 2 by manual pressure. c

It will be observed that in each case the removal of the closure is necessarily accompanied by a compression of the sealing washer and that due to the construction described, the closure may be removed as often as desired and reapplied to at the container as often as desired to form an efiective and airtight sea-l, all without in any way deforming or otherwise damaging the cap closure itself.

While it is preferred that the depending flange icoedge, said container having an annular sealing flange curved in two directions at right angles to each other and variably deforming said washer, by compressing it against said annular flange and thereby variably reducing its thickness and brin ging its irmer face into contacting conformation with the two-directional curve of said annular sealing flange, said container having a radially extending fulcrum flange below, adjacent and substantially in alignment with the closure bead.

DAVID B. RONZONE. 

